When my car gets up in high rpms my car starts to hesistate or kind of wimp out. i have to shift into the next gear so it will go to lower rpms and pull. will pull great till around 3500 -4000 and it gives up. my boost gauge reads 14.5 in 2nd and 13 in 3rd with no mods except a removed air scilencer. thas wierd huh? exhaust restrictions? well my intermittent CEL has been staying on longer and longer but still goes off and on alot. the only code is 172, which i know is an 02 sensor so thats why im asking. part throttle performance is great and so is low end performance. i dont know exactly where it should be, considering it hasnt run perfect ever scince i got it, but i know it will kill my moms 94 5 speed v6 mustang. i dont know what the problem is. i know i have a boost leak somewhere cause my vac sits on 15 at idle. but it has tons of power still as long as you in the low end.
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